Journal of thermal analysis

, Volume 36, Issue 2, pp 707–720 | Cite as

Thermoanalytical behaviour of some dicarboxylato-α-diiminecobalt(III) complexes

  • S. Brini
  • R. Bucci
  • V. Carunchio
  • A. D. Magri


The complexes cis-Co[(AA)2(OCOR)2]NO3, where AA=1,10-phenanthroline or 2,2′-bipyridine and R=H, CH3, C2H5, or n-C3H7 were studied by TG, DTA and spectroscopic methods to obtain information concerning the decomposition mechanism. A comparison of the two series revealed that the first decomposition process involves breaking of Co-N bonds and elimination of the nitrogen ligand in both series; the phenanthroline complexes show a stability sequence, whereas all the bipyridine complexes start to decompose at the same temperature. The results were also compared with previous data on ethylenediamine complexes.


Nitrogen Polymer Physical Chemistry Inorganic Chemistry Ethylenediamine 
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Zur Ermittlung von Informationen über den Zersetzungsmechanismus wurde mittels TG-, DTA- und spektroskopischen Methoden cis-Co[(AA)2 (OCOR)2]NO3 untersucht, wobei AA=1,10-Phenanthrolin oder 2,2′-Bipyridin sowie R=H, CH3, C2H5 oder n-C3H7 ist. Ein Vergleich beider Verbindungsreihen ergab, dass der erste Schritt der Zersetzung in der Spaltung der Co-N-Bindung und der Abspaltung des Stickstoffliganden besteht; Phenanthrolinkomplexe zeigen eine gewisse Stabilitätsreihenfolge, während alle Bipyridinkomplexe ihre Zersetzung bei der gleichen Temperature beginnen. Die erhaltenen Ergebnisse wurden weiterhin mit früheren Untersuchungsergebnissen über Ethylendiaminkomplexe verglichen.


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Copyright information

© Wiley Heyden Ltd, Chichester and Akadémiai Kiadó, Budapest 1990

Authors and Affiliations

  • S. Brini
    • 1
  • R. Bucci
    • 1
  • V. Carunchio
    • 1
  • A. D. Magri
    • 1
  1. 1.Dipartimento di ChimicaUniversità “La Sapienza”RomaItaly

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